SRT-1 Set Of Protection Relays For High-Voltage And Low-Voltage Networks Educational Equipment Electrical Training Panel
This system has been designed to enable students to connect and apply a wide range of electric, electronic protection relays with circuits of increasing complexity, besides verifying their characteristics. TECHNICAL CHARACTERISTICS: Set of modules for studying static protection relays andmeasuring transformers: 1 Module SR-1 1 three-phase maximum-current and short-circuit relay,adjustment range 0,5-2A/1-16 A ac, auxiliary power supply of230 V 50-60 Hz. 1 Module SR-2 1 single-phase maximum or minimum current relay, adjustmentrange 0.1-5A/ 5-25 A ac/dc, auxiliary power supply of 230 V 50-60 Hz. 1 Module SR-3 1 three-phase maximum and minimum voltage relay /N,adjustment range +10% / -15%, Ue 380-400 Vac, self-powered. 1 Module SR-4 1 single-phase maximum or minimum voltage relay, adjustmentrange 2-500 Vac/dc, auxiliary power supply of 230 V 50-60 Hz. 1 Module SR-5 1 maximum and minimum frequency relay, 50-60 Hz,adjustment range + 10%, self-powered at 230 Vac. 1 Module SR-6 1 phase sequence and voltage asymmetry relay for networks of400 V, asymmetry adjustment range: 5 -15%, self-powered at400 Vac. 1 Modulo SR-7 1 auxiliary relay with two exchange contacts, driven by TTL/PLCsignals / buttons of 24 Vdc for excitation, stop, start. 1 Module SR-8 1 auxiliary relay with two exchange contacts, excitation 24 Vdc,1 optical acoustic indicator of 24 Vac/dc. 1 Module SR-9 1 timer relay with one exchange contact, multi-function, multirange, multi-voltage, 24 Vac/dc 1 Module SR-10 directional overcurrent relay, 5 A - 400 V, auxiliary power supplyof 230 Vac. 1 Module SR-11 3 wound-primary current transformers 10/5 A, performance 3VA in cl. 0.5. 1 Module SR-12 voltage transformers 500/100 V, performance 10 VA in cl. 0.5. 1 Module SR-13 1 current step-up transformer 5 + 5 + 5/5 A, performance 8 VAin cl. 0.5 TRAINING PROGRAM: • Connections and study of the behaviour of a maximumcurrent relay in a three-phasenetwork with different currentvalues, verifi cation of trip time. • Connections and study of the behaviour of a short-circuitcurrent relay in a three-phase network with different currentvalues, verifi cation of trip time. • Connections and study of the behaviour of a single-phasemaximum or minimum current relay, verifi cation of trip timefor maximum and minimum current. • Connections and study of the behaviour of a maximum orminimum DC relay, verifi cation of trip time for maximumand minimum current. • Connections and study of the behaviour of a maximumand minimum voltage relay in a three-phase network withneutral, verifi cation of trip time for maximum and minimumvoltage. • Connections and study of the behaviour of a single-phasemaximum or minimum voltage relay, verifi cation of trip timefor maximum and minimum voltage. • Connections and study of the behaviour of a maximumand minimum DC voltage relay, verifi cation of trip time formaximum and minimum voltage. • Connections and study of the behaviour of a maximum andminimum frequency relay, verifi cation of its operation atmaximum and minimum voltage. • Connections and study of the behaviour of a phasesequence and voltage asymmetry relay in a three-phasenetwork, verifi cation of its operation with wrong sequenceand in non-asymmetric conditions or missing phase. • Connections and study of the behaviour of a maximumcurrent directional relay in a three-phase network,verifi cation of its operation with reverse current fl ow andas directional of maximum earth current (suitable for linesand generators). • Use of auxiliary relays as interface of protection relays forcontrolling high power flows • Use of auxiliary relays as interface for remote, optical/acoustic signalling of intervention of protection relays. • Use of timers with various time functions to increase thefunctionality of protection relays • Determination of the transformation ratio of a TA withvarious primary currents and infl uence of load on thesecondary winding, performance tests. • Connection of current transformers in three-phasenetworks. • Measurement of zero sequence current in a three-phasesystem. • Tests on a current step-up transformer. • Demonstration of the differential protection principle. • Determination of the transformation ratio of a TV withvarious primary voltages and infl uence of load on thesecondary winding, performance tests. • Connections of voltage transformers in three-phasenetworks. • Connections of open-delta voltage transformers in threephase networks. Supply with THEORETICAL – EXPERIMENTAL HANDBOOK
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